Epcot Presents Holidays Around the World International holiday traditions unfold throughout World Showcase Nov. 27-Dec. 30 when storytellers such as Pere Noel in France, La Befana in Italy and Santa Claus in The American Adventure share the traditions of the season and spread the message of goodwill.
If the WDW Press site is correct (and nothing changes between now and then), you may be able to find Santa at Epcot in the US pavilion...